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A $28$-year-old man with a history of type $1$ diabetes mellitus is brought to the emergency department complaining of severe nausea, vomiting, and diffuse abdominal pain for the past $24$ hours. He reports missing several doses of his basal insulin due to a recent gastrointestinal illness. Vital signs show a temperature of $37.1^\circ\text{C}$ ($98.8^\circ\text{F}$), heart rate of $124$/min, blood pressure of $96/58$ mmHg, and respiratory rate of $24$/min with deep, rapid breaths. Laboratory studies reveal:

Serum glucose: $580$ mg/dL
Serum sodium: $134$ mEq/L
Serum potassium: $4.6$ mEq/L
Serum chloride: $98$ mEq/L
Serum bicarbonate: $12$ mEq/L
Arterial pH: $7.22$
Urinalysis: $3+$ ketones

Arrange the following pharmacologic interventions in the most appropriate chronological sequence for the management of this patient, from initial presentation to clinical resolution.

A 65-year-old man presents to the clinic with a 2-month history of worsening fatigue, generalized weakness, constipation, and increased frequency of urination. He also reports an unintentional weight loss of $6 \text{ kg}$ ($13.2 \text{ lb}$) during this time. His wife notes that he has become increasingly forgetful and confused over the past week. He has a 45-pack-year smoking history and a chronic morning cough but denies hemoptysis or bone pain. Vital signs are within normal limits. Physical examination reveals a cachectic appearance and scattered end-expiratory wheezes bilaterally. Laboratory evaluation is significant for a serum calcium level of $13.8 \text{ mg/dL}$ (normal: $8.4-10.2 \text{ mg/dL}$), serum albumin of $3.2 \text{ g/dL}$, and serum creatinine of $1.7 \text{ mg/dL}$ (normal: $0.6-1.2 \text{ mg/dL}$).

Based on the patient's clinical presentation, arrange the following diagnoses in order from most likely to least likely:

A $32$-year-old woman is brought to the emergency department by her family due to profound confusion, agitation, and a high fever. She has a history of Graves disease but stopped taking her prescribed medications three months ago. On presentation, her temperature is $39.8^\circ \text{C}$ ($103.6^\circ \text{F}$), blood pressure is $160/70$ mm Hg, heart rate is $155$/min and irregular, and respiratory rate is $24$/min. Physical examination reveals a restless, diaphoretic patient with prominent exophthalmos, a diffusely enlarged and non-tender thyroid gland, a fine tremor in her outstretched hands, and a faint yellowing of her sclerae. An electrocardiogram confirms atrial fibrillation with a rapid ventricular response. A clinical diagnosis of thyroid storm is made. Arrange the following pharmacologic agents in the correct chronological sequence for the protocolized management of this patient's endocrine emergency.

A 32-year-old woman is brought to the emergency department by her husband after experiencing a witnessed generalized tonic-clonic seizure. The patient is 3 weeks postpartum following an uncomplicated vaginal delivery with epidural anesthesia. Her husband reports that she has been complaining of a progressively worsening, diffuse headache for the past 4 days. She has no prior history of seizures. During her pregnancy, she had diet-controlled gestational diabetes, but her blood pressure was normal. On presentation, she is lethargic and oriented to person only. Her blood pressure is 148/92 mmHg, heart rate is 94/min, and temperature is 37.1°C (98.8°F). Funduscopic examination reveals bilateral papilledema. Neurological examination demonstrates 4/5 motor strength in the right upper and lower extremities. Urine dipstick shows trace protein.

Arrange the following differential diagnoses in order from highest pre-test probability to lowest pre-test probability based on this patient's clinical presentation.

A $34$-year-old man is brought to the emergency department via ambulance after being struck by a high-speed vehicle as a pedestrian. On arrival, he is confused and visibly diaphoretic. His blood pressure is $72/40 \text{ mmHg}$, heart rate is $142 \text{ /min}$, and respiratory rate is $28 \text{ /min}$. Pulse oximetry shows $94\%$ on a non-rebreather mask. The airway is patent, and breath sounds are equal bilaterally. The abdomen is tense and distended. Physical examination reveals an unstable pelvic ring upon gentle medial compression of the iliac crests. Two large-bore peripheral intravenous lines are established, and balanced blood product resuscitation is initiated.

Arrange the following procedural and diagnostic steps in the most appropriate chronological sequence for managing this patient's condition:

A 46-year-old male patient presents to the internal medicine clinic due to poorly controlled hypertension. His current medication regimen consists of maximally tolerated doses of amlodipine, olmesartan, and chlorthalidone. Today, his resting blood pressure is 168/94 mm Hg. Physical examination is unremarkable with no abdominal bruits, edema, or cushingoid features. Laboratory studies reveal a serum potassium level of 2.8 mEq/L and a serum bicarbonate level of 30 mEq/L. Given the presence of severe hypertension and spontaneous hypokalemia, there is strong suspicion for a specific secondary etiology. The patient's antihypertensive regimen is transitioned to doxazosin and verapamil for several weeks to prevent assay interference, and a stepwise diagnostic evaluation is planned. Arrange the following diagnostic studies in the most appropriate, guideline-directed sequence to evaluate this patient's condition, from the initial diagnostic step to definitive pre-surgical planning.

A 35-year-old woman with a history of systemic lupus erythematosus (SLE) presents to the emergency department complaining of a 2-hour history of sudden-onset, left-sided pleuritic chest pain and shortness of breath. Her temperature is 37.1°C (98.8°F), blood pressure is 118/76 mmHg, heart rate is 112/min, respiratory rate is 24/min, and oxygen saturation is 91% on room air. Physical examination is notable for clear lungs bilaterally, a normal cardiac rhythm with no murmurs, and mild, asymmetric edema with tenderness in her left calf.

Based on the clinical presentation, arrange the following differential diagnoses in order from the highest pre-test probability (most likely diagnosis) to the lowest pre-test probability (least likely diagnosis).

A 34-year-old female is evaluated in the post-anesthesia care unit 45 minutes after undergoing a total thyroidectomy for Graves disease. The nursing staff urgently calls the physician because the patient has become extremely agitated, is grasping at her neck, and is struggling to breathe. Vital signs are temperature 37.1°C (98.8°F), blood pressure 168/96 mmHg, heart rate 124/min, and respiratory rate 28/min. Oxygen saturation is 86% on a non-rebreather mask. Physical examination reveals audible biphasic stridor, a tense and rapidly expanding swelling of the anterior neck, and fresh ecchymosis extending toward the sternal notch. The surgical dressing is saturated with bright red blood. Arrange the following interventions in the most appropriate chronological order for managing this patient's acute complication.

A 55-year-old male with a history of alcohol-associated cirrhosis arrives at the emergency department via ambulance after vomiting a large volume of bright red blood. He is confused and lethargic. Vital signs show a temperature of 36.8°C (98.2°F), blood pressure of 82/45 mm Hg, heart rate of 128/min, and respiratory rate of 22/min. Physical examination reveals scleral icterus, spider angiomas on the chest, and a distended abdomen with a positive fluid wave. The patient continues to have active hematemesis in the trauma bay.

Arrange the following management steps and procedural interventions in the most appropriate chronological sequence for this patient, assuming each successive intervention fails to achieve definitive hemostasis.

A 42-year-old man is diagnosed with a 5-cm right adrenal pheochromocytoma after presenting with episodic palpitations, diaphoresis, and severe hypertension. He is scheduled for a laparoscopic adrenalectomy in 14 days. His current blood pressure is 185/110 mmHg, and his heart rate is 98/min. To ensure optimal surgical outcomes and minimize perioperative complications, an escalating protocol of hemodynamic management is required.

Arrange the following pharmacologic interventions in the correct chronological sequence of administration, from 14 days preoperatively through to the intraoperative period.

An $82$-year-old resident of a nursing facility is evaluated in the emergency department for the sudden onset of tearing lower back pain and a brief loss of consciousness. Vital signs demonstrate a blood pressure of $80/50$ mmHg, a heart rate of $118$/min, and an oxygen saturation of $96\%$ on room air. Medical history is notable for essential hypertension and a $40$-pack-year smoking habit. Physical examination reveals a distended abdomen and pale, cool extremities. Arrange the following diagnostic considerations in order from the highest pre-test probability to the lowest pre-test probability based on this specific clinical presentation.

A 35-year-old woman is evaluated in the clinic due to a six-month history of episodic, severe headaches accompanied by profound diaphoresis and a sensation of a racing heart. She reports that these episodes occur spontaneously and last for 15 to 20 minutes. In the clinic, her blood pressure is 172/104 mmHg, and her heart rate is 98/min. The remainder of her physical examination is unremarkable. Given the high clinical suspicion for a catecholamine-secreting tumor, arrange the following diagnostic steps in the most appropriate standard sequence, progressing from initial screening to comprehensive preoperative staging and risk stratification.

A $64$-year-old man with a $15$-year history of poorly controlled type 2 diabetes mellitus and peripheral arterial disease is brought to the emergency department due to altered mental status and severe right foot pain. His temperature is $39.1^\circ\text{C}$ ($102.4^\circ\text{F}$), blood pressure is $88/54\text{ mm Hg}$, heart rate is $122/\text{min}$, and respiratory rate is $22/\text{min}$. Examination reveals a black, malodorous ulcer over the right first metatarsal head. There is surrounding erythema, significant edema, and palpable crepitus extending to the midfoot. Right dorsalis pedis and posterior tibial pulses are not palpable by manual examination or Doppler ultrasound. Laboratory studies show a leukocyte count of $24,000/\text{mm}^3$ and serum lactate of $4.8\text{ mmol/L}$. Arrange the following procedural and management steps in the most appropriate chronological order.

A 34-year-old woman is brought to the emergency department by her husband due to severe agitation, confusion, and fever. She has a history of Graves disease but stopped taking her antithyroid medications three months ago. Her temperature is 39.4°C (103.0°F), blood pressure is 158/72 mmHg, and pulse is 152/min and irregular. Physical examination reveals a diffuse, non-tender goiter, marked diaphoresis, and a fine tremor. An electrocardiogram demonstrates atrial fibrillation with rapid ventricular response. A clinical diagnosis of thyroid storm is made. While multiple therapies are required for comprehensive management, they must be administered in a highly specific physiological sequence to prevent the paradoxical worsening of the thyrotoxicosis. Arrange the following pharmacologic interventions in the correct chronological order of administration.

Emergency medical services transport a 42-year-old man to the emergency department for an ongoing seizure. Paramedics report the patient's wife witnessed the onset of generalized tonic-clonic activity 12 minutes prior to arrival. He has a known history of epilepsy and recently missed several doses of his home medications. Upon arrival, the patient remains unresponsive with continuous, rhythmic jerking of all four extremities. Vital signs show a blood pressure of 160/95 mmHg, a heart rate of 132/min, and an oxygen saturation of 94% on a non-rebreather mask. A point-of-care blood glucose level is 115 mg/dL. Intravenous access is rapidly secured. Arrange the following pharmacologic interventions in the correct chronological sequence for the stepwise management of this patient's status epilepticus, starting with the most appropriate immediate therapy and escalating to treatments for refractory and super-refractory cases.

A 64-year-old woman is evaluated in the surgical intensive care unit for a rapidly declining platelet count. Seven days ago, she underwent a complex coronary artery bypass grafting procedure. Her postoperative course was initially uncomplicated, and she has been receiving subcutaneous unfractionated heparin for deep vein thrombosis prophylaxis. Today, her platelet count is 55,000/μL, representing a 65% drop from her baseline of 180,000/μL. Examination reveals a new, painful, swollen right lower extremity. Venous duplex ultrasonography confirms an acute right popliteal deep vein thrombosis. A clinical diagnosis of heparin-induced thrombocytopenia (HIT) is suspected based on a 4T score of 6 (high probability). Arrange the following management and monitoring steps in the most appropriate chronological sequence for this patient.

A 48-year-old male presents to the clinic complaining of excessive sweating, diffuse joint pain, and a gradual increase in his shoe size over the past three years. He also mentions that he recently had to have his wedding ring resized because it would no longer fit over his knuckle. On physical examination, his blood pressure is 148/92 mm Hg. He is noted to have coarse facial features, a prominent mandible, macroglossia, and enlarged, doughy hands. The physician strongly suspects an underlying endocrine disorder characterized by hormonal hypersecretion.

Assuming each step confirms the progression of the diagnostic pathway, arrange the following clinical evaluations in the most appropriate sequential order to screen for, confirm, localize, and assess the local complications of this patient's suspected condition.

A 54-year-old woman with a history of diffuse large B-cell lymphoma presents to the emergency department with chills and a temperature of $38.9^\circ\text{C}$ ($102.0^\circ\text{F}$). She received her last cycle of cytotoxic chemotherapy 8 days ago. Laboratory studies show a white blood cell count of $700/\text{mm}^3$ with $30\%$ neutrophils (absolute neutrophil count: $210/\text{mm}^3$). She is hemodynamically stable, has a central venous port in place, and has no localizing signs of infection on physical examination. Arrange the following steps in the optimal sequence for the evaluation, monitoring, and therapeutic de-escalation of this patient's condition.

A 72-year-old woman is preparing for discharge after a 4-day hospitalization for community-acquired pneumonia. She is clinically stable but has new-onset weakness and requires assistance with activities of daily living. Arrange the following steps of the discharge planning and care transition process in the most appropriate chronological sequence to ensure safe disposition and minimize readmission risk.

A 34-year-old woman is brought to the emergency department by paramedics following a high-speed motor vehicle collision. On arrival, she is unresponsive and has a Glasgow Coma Scale score of 6 (E1, V1, M4). She has obvious blunt trauma to her abdomen with extensive ecchymosis across her lower quadrants.

Vital signs are:
* Temperature: 35.8°C (96.4°F)
* Heart rate: 142/min
* Blood pressure: 68/38 mm Hg
* Respiratory rate: 8/min and shallow
* Oxygen saturation: 84% on room air

Arrange the following initial stabilization and management steps in the most appropriate sequential order.